/Engine/Source/Runtime/GeometryCore/Public/MeshBoundaryLoops.h
Check if forward path from loopV[i1] to loopV[i2] contains any bowtie verts other than bowtieV
static bool IsSimplePath ( const [TArray](API\Runtime\Core\Containers\TArray)< int > & LoopVerts, const [TArray](API\Runtime\Core\Containers\TArray)< int > & BowtieVerts, int BowtieVertex, int i1, int i2 )